Roller-bearing.



J. H. CARR.

ROLLER BEARING.

APPLICATION FILEDIFEB. l6, 19H.

17,139,161, Patented May 11, 1915.

Zia?- -muewfoi wheels.

mrnn snares FATENZ? @r- JOHN H. CARE, OF ALHAMBRA, CALIFORNIA.

BOLLEB-BEARING.

Specification of Letters I'atent.

' Patented May it, 1915..

Original app pation filed September 16, 1313, Serial No. 789,967. Divided and this application tiled February 15,1914, Serial No. 849,040.

To all'wirom it may concern 1 i Be it known that I, Jonx H CARR, a citizenjof the United States, residing at Alhambr'aj in the county of Los Angcles and State of. Galifornia-,. have invented certain new andjnseful linprovements in Roller-Bearings'j, ofjvhich the following is a full, clear,

'and ex'act specification,

-This invention relates to roller bearings for axles, especially designed for use with the wheel axleso'f vehicles, and it has for its object to greatly reduce friction; this application being a division of my applicationfiledx-September 16. 1913, Serial No.

The invention will first be hereinafter described in connection with the accomvpanying drawings, \vhich constitute a part accordance with my invention, the bearing for the portion of the axle at one side of the wheel being shown in section. Fig. 2 is an enlarged longitudinal section through one of the bearings; Fig. is a cross section on the line-HL-Hl of Fig. 2, through the roller bearing proper, and Zrig; t is cross section on. the line 1V-Il of Fig. 2,

through-the grooves for the key-balls YVhile I have elected to illustrate my improved hearing as applied to a caster wheel,

it will be understood that it may be used As illustrated, the wheel A is mo1inted on a shaft or stub axle B which extends in opposite directions into journals- C at the lower ends of the forks D of the caster bracket E.

Each bearing, as-used on each end of the "axle B, preferably includes two or more sets of rollers F and If, the rollers of one set being staggered with respect to those of the other. set. it is evident that'in rolling, the axle rnust move'over the rollers in succession and, consequently,pass over the top of one roller into the space between it and the next one, and then climb up on the next roller and soon, so that, while the effect of this climbing and falling may hardly be noticed, yet it is undoubtedly causing friction and jarring all the time which can only be overcome by reducing the diameter of the rollers and insertingv many more. Theoretically,- this friction may only be eliminated by inserting an infinito number of rollers of infinitely smallv diameter so as to provide a continuously rolling surface. The present construction reduces this friction materially or to a. certain extent (hitherto neglected) by staggering the rollers so that they come successii'ely over the ridge of the axle twice as many rollers pass over the axle an lthe size of the valleys between successive rollers is reduced one half as compared to the stand, ard bearing.

The rollers may be held in proper position by a pair of end spacer rings G and an intermediate spacer ring H, the latter servmg for both sets of rollers, as best illus-v trated in Fig. 2.

In order to further reduce the friction, the inside diameter of the roller bearings is enlarged beyond the diameter of the axle, so that only a few of the rollers, theoretically only two at the most, bear on the axle at the same time. l/Vhilc it is evident that this clearance of the axle would otter opportunity for continuous vibration and jars which would be detrimental to the whole of the vehicle if provision is not made against it, this construction is turned to advantage by introducing two balls K into the two sections Z, Z of a groove L at one end of the bearing.

This grove L is formed with a radius considerably greater than that of the axle, as clearly shown in F 4, and is evenly divided one each side of the axle, the lowest point of said groove being located immediately below the center of the axle. At this middle and lowest point of the groove, a

partition Z is formed, dividing the groove into the sections Z, Z, already mentioned. This partition separates the two balls K and prevents either of them from passing beyond-the vertical center line of the axle. In fact, said partition keeps the balls a fraction of an inch to either side of said vertical center line, so that they cannot become wedged'below the axle but are both free to move outward in their respective groove sectie; This arrangement of grooves and balls prevents the axle from pumping and at the same time permits it'to give laterally when subjected to heavy shocks, thus providing relief and. still preventing a violent recoil. In fact, the insertion of the balls in the groove, as described and illustrated, makes a simple, cheap and elllcient shock absorber.

It will-be understood, of course, that the bearing may be bathed in oil, if desired. For protection, dust rin'gs Mare put on the outer ends of the journals as shown in Figs. 1 and 2. It will also be noted that the lower half C of each journal is removable to permil; the parts to be readily assembled.

Having thus described my invention, what I claim as new and. desire to secure'by Letters Patent of the United States is:

1 The combination with an axle, of a journal, a part of which is of greater diameter than said axle, bearing elements mounted in said enlarged part of the journal, there being/a groove in the journal extending below the axle and a ball in said groove and contacting with the under surface of the axle.

2. The combination with an axle, of a journal, a part of which is of greater di'- ameter than said axle, a roller bearing'comprising a set of rollers and spacer rings of greater diameter than the axle and arranged in the enlarged part of the journal, there being a groovein the journal arranged at one end of the enlarged portion and extending below the axle, and a ball in-said groove and contacting with the under surface of the axle.

3. The combination with an axle,- of a journal, '21 partof which is of greater diameter than said axle, a roller bearing comprising sets of rollers and spacer rings of greater diameter than the axle and arranged in the enlarged part of the journal, there being a groove in the journal arranged at one end oi the enlarged portion and extending below the axle, said groove being formed on acurve of greater radius than the axle, and a ball in said groove and contacting with the under surface of the axle for the purpose specified.

4;. The combination with an axle, of'a journal, a part of which is of greater diameter than said axle, a roller bearing comjournal, :1. part of which is of greater diameter than said axle, a roller bearing comprising sets of rollers and spacer rings of reater diameter than the axle and arran ed in the. enlarged part of the journal, there eing a groove in the journal arranged at one end 0 the enlarged portion and extending below the axle, said groove being formed on a curve of greater radiusthan the axle an arranged eccentrically of the latter, the lowest point of said groove being located di-- rectly below the vertical center line' of the axle, and a ball in said roove and contacting with the under sur ace of the axle for the purpose specified.

6. The combination with an axle, of .a journal, at part of which is of greater diameter than said axle, a roller bearing comprising sets of rollers and spacer rings of eater diameter than the axle andarranged 1n the enlarged part of the journal, there being a groove in the journal arranged at one end 0 the enlarged portion and extending below the axle, said groove bein formed on a curve of greater radius than t e axle and arranged eccentrioal'ly of the latter, the lowest'point of said groove being located directly below the vertical center line of the axle, a partition in said groove at the lowest 'point thereof, and "two balls in said groove,

one on each side of said partition, said balls contacting with the lunder surface of the axle for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two attesting witnesses.

I JOHN H. CARR. Witnesses: i

ROBERT ALWALKER, JAMES CFKEELER. 

